Duffel bag



FIG. 1 is a top, front, right perspective view of a duffel bag showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The contrast in shading represents a contrast in appearance only and does not represent any particular color, material, texture or finish. The broken lines illustrate stitching and the zipper teeth. None of the broken lines form part of the claimed design. 

CLAIM The ornamental design for a duffel bag, as shown and described. 